Have You Considered These Factors?

  • Torsion Spring Shaft — Shafts that are much smaller than 90% should be avoided – otherwise buckling may occur during large deflections.
  • Minimum Hysteresis — Torsion spring applications that require minimum hysteresis, reduce their frictional loss by adding space between adjacent coils.
  • Torsion springs are capable of surging or resonance phenomena.
  • Load and Deflection Requirements — Specify torsion spring loads at a Fixed Angular Position instead of fixed deflection from the free position.
  • Torsion Spring Stress — Bending is the main cause of stress in Torsion Springs and may require a stress correction factor configured during design.
  • When designing ends with sharp bends, the wire may be stretched or marked and may cause stress concentrations leading to a reduction in design stress levels that may fall below the recommended levels. (NOTE: Friction occurs at the point of contact between the torsion end and the arbor, which induces a higher stressed area.)
  • Double Torsion Springs and single torsion springs are designed with the same methods. (NOTE: Design double torsion springs so they coil out from the center instead of coiling in from the ends.)

Special End Configurations Are Available Upon Request